On Fri, 2004-02-20 at 07:51, Jennifer Fountain wrote: > Hi Guys, > Thank you for the wonderful responses yesterday. I had another question > - does anyone use tmda with SA http://tmda.net/>? I am thinking about > giving it a try but I do use qmail and relay it to my exchange box. I > am not sure if this will work like I want it to. >
I used to set SA to a very low threshold (like 1.0 or so) and invoke TMDA on messages that were tagged as spam. It was a pretty decent setup, except: TMDA generated a lot of return traffic; TMDA works by sending out bounces, but in the case of spammers the return address is usually invalid in one way or another. My outgoing queue regularly had thousands of bounces waiting to go out; 95%+ were TMDA bounces. SA + TMDA took a long time to deliver messages (compared to just straight Maildir delivery). At peak loads, my mail server would accept a lot of mail off the wire and queue it internally for delivery. Since qmail's queue is just that - a queue, all new incoming mail would be backlogged for several hours while SA + TMDA did its thing. This problem doesn't happen when using qmail-scanner because scanning is done at queue time. qmail doesn't send back a response code to the sending SMTP until after clam/SA is done running. The *sending* server is made to wait; my server doesn't go down in flames. I had TMDA's pending queue set up to be invisible to my users, but if I want to use Bayes, I need to have a "Spam" folder for them to drop uncaught spam into. So it's simpler (and *so* much easier to explain to the users) to have tagged spam go into the "Spam" folder, and if SA misses one, put it in there for SA to learn for next time. HTH. - Jon -- [EMAIL PROTECTED] Administrator, tgpsolutions http://www.tgpsolutions.com
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